na_eex
Fit Function | \[\sigma_{e}^{exc, Na} (E) = \frac{10^{-16}A_7}{E} \Bigg[\frac{E - \Delta E}{E} \Bigg]^{A_6} \Bigg[A_5 \ln\bigg( \frac{E}{\Delta E} \bigg) + \sum_{j=1}^{4} A_j \bigg( \frac{E}{\Delta E} \bigg) ^{-(j-1)} \Bigg]\] |
Comments | Python code requires NumPy imported as `np`. |
Arguments |
|
||||||||||||||||||||||||||||||||||||||||
Return values |
|
||||||||||||||||||||||||||||||||||||||||
Code | def na_eex(E, A1, A2, A3, A4, A5, A6, A7, I): """ This function calculates electron impact excitation cross sections (in cm2) of Na from [3s ... 4f] to [3p ... 5s] param E: requested electron-impact energy in eV type E: float, np.ndarray param Ai: fit coefficient type Ai: float param I: ionization energy in eV type I: float """ sigma = (A7*1e-16)/E * ((E-I)/E)**A6 * (A1/(E/I)**0 + A2/(E/I)**1 + A3/(E/I)**2 + A4/(E/I)**3 + A5*np.log(E/I)) return sigma |